diff --git a/requirements-dev.txt b/requirements-dev.txt
index da77ae2..3cd990e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,4 @@
+jinja2==3.0.3
 Sphinx==1.5.6
 sphinx-rtd-theme==0.1.9